“This is a list in progress of color laser printer models that do or do not print yellow tracking dots on their output. We have employed three sources of information. We looked at printer output under a blue light and/or a computer microscope; we consulted press reports about printers (e.g. at Druckerchannel); we relied on printer manuals and other manufacturer statements. We welcome additional statements by manufacturers, resellers, or technicians.”
https://www.eff.org/pages/list-printers-which-do-or-do-not-display-tracking-dots
